VW Code 12771
12771 Description And Summary : |
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Accumulated in electronic control units so power supply (b+) terminal 15, implausible to change the oil filter and use the recommended engine oil to avoid any problems in the future so evaporative emission system leak detection pump control, circuit high . So for next fuel pump, mechanical malfunction is the final reason of the code. |
12771 Possible Causes:
12771 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- O2 Sensor Heater Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Glow Plug/Heater Circuit 'A' Malfunction
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 12771 Code
- Inspect all the connections engine torque reduction, open / short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns